Harbor Freight put out an e-mail recently announcing a new product that they have released. The e-mail featured the Thunderbolt 18 watt solar panel #57968. This is a folding solar panel that includes 2 USB ports with a 3A output max. The price is $94.99.

Two high-efficiency monocrystalline solar cells for maximum output

Charges a typical smartphone in 2.5 to 5 hours and most large tablets in 4 to 10 hours

Rugged build to withstand harsh weather

Below are some similar items available on Amazon that you will easily see are a much better value than the Harbor Freight Thunderbolt.

MOOLSUN 50W Solar Panel Power

🟩Foldable and Portable: The foldable design makes the 24W solar panel charger have a smaller folding size and portability, which can be taken anywhere you need;
🟩High Quality With High Efficiency: Our solar panel charger is made of high-quality materials, and the solar cells are carefully selected. ETFE, EVA, PCB boards are all...
🟩Multifunctionality with Unique 3 USB Port Controller: Our 5V solar panel charger has a unique 3 USB (QC) voltage controller, which can be used to quickly charge 3 USB devices...

Promotion availability and prices can change at any time on Amazon. Information included on this page is accurate as of 2026-09-28 at 04:05 CST.